..Injuries may be "specific" (SI) including ligament or meniscal tears or patellar trauma, or "nonspecific" (NSI). Our objective is to understand the effect of knee NSI on ROA incidence and progression...

The effect of disease site (knee, hip, hand, foot, lower back or neck) on employment reduction due to osteoarthritis

..Osteoarthritis (OA) has a significant impact on individuals' ability to work. Our goal was to investigate the effects of the site of OA (knee, hip, hand, foot, lower back or neck) on employment reduction due to OA (EROA)...

Quantifying the association of radiographic osteoarthritis in knee or hip joints with other knees or hips: the Johnston County Osteoarthritis Project

..This study explored the relationships among the roles assumed by physical therapists in arthritis care and their previous participation in arthritis courses for continuing professional development (CPD)...

ROC area discrimination (ROCAD) curve: a new method of evaluating the discriminating ability of ordinal scales

Jacek A KopecDepartment of Health Care and Epidemiology, University of British Columbia, Arthritis Research Centre of Canada, Vancouver, BC, CanadaJ Clin Epidemiol 61:997-1003.e1. 2008

..In this paper, we propose to use the ROC area to evaluate the discriminating power of ordinal measures, such as many subjective ratings or multioption questionnaire items...

Computerized adaptive testing in back pain: validation of the CAT-5D-QOL

Jacek A KopecDepartment of Health Care and Epidemiology, University of British Columbia, Vancouver, BC, CanadaSpine (Phila Pa 1976) 33:1384-90. 2008

..We have conducted an outcome instrument validation study...

Responsiveness of health state utility values in knee osteoarthritis

Erin M DavisFrom the School of Pharmacy, Memorial University, St John s, Newfoundland and Labrador Collaboration for Outcomes Research and Evaluation CORE, and School of Population and Public Health, University of British Columbia, Arthritis Research Centre, and Centre for Health Evaluation and Outcome Sciences, Providence Health Care Research Institute, Vancouver, British Columbia, CanadaJ Rheumatol 40:2075-82. 2013

..Therefore, we examined the responsiveness of the Health Utilities Index mark 3 (HUI3) and Paper Adaptive Test-5D (PAT-5DQOL) in a group of patients with knee OA...

Validation of population-based disease simulation models: a review of concepts and methods

Jacek A KopecSchool of Population and Public Health, University of British Columbia, Vancouver, BC, CanadaBMC Public Health 10:710. 2010

..The purpose of this article is to review the principles and methods for validation of population-based disease simulation models...

..To assess the strength of causal inferences reported in randomized and nonrandomized evaluations of quality improvement (QI) interventions in relation to the study design and the direction of results for the primary outcomes...

Preliminary validation of 2 magnetic resonance image scoring systems for osteoarthritis of the hip according to the OMERACT filter

Walter P MaksymowychFrom the Department of Medicine, and the Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Alberta Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada Department of Medicine, CHU de Nancy Brabois, Vandoeuvre, France Department of Rheumatology, Balgrist University Hospital, Zurich, Switzerland Department of Radiology at University of Erlangen Nuremberg, Klinikum Augsburg, Augsburg, Germany Quantitative Imaging Center, Department of Radiology, Boston University School of Medicine, Boston, Massachusetts, USA Arthritis Research Centre, Richmond, British Columbia, CanadaJ Rheumatol 41:370-8. 2014

..We assessed the feasibility and reliability of 2 previously developed scoring methods: (1) the Hip Inflammation MRI Scoring System (HIMRISS) and (2) the Hip Osteoarthritis MRI Scoring System (HOAMS)...